The energy, exergy, and hydrodynamic characteristics of employing a boehmite alumina nanofluid inside a spiral heat exchanger are investigated through CFD analysis regarding five different nanoparticle shapes. The numerical simulations are performed at four different volume fractions ranging from 0 to 0.04. It is found that utilizing the nanofluid at a higher volume fraction enhances the heat exchange amount, overall heat transfer coefficient (U), and effectiveness. It is unveiled that the highest rise in the U at the constant Reynolds number (Re) is about 25.4%, while this value at the constant pumping power ($\dot{W}$) is 6.35%. Additionally, concerning the thermal efficiency viewpoint, it is proposed to use the platelet-shaped nanoparticles at the constant Re. The oblate spheroid-shaped nanoparticles are suggested considering the energy efficiency perspective. Based on the second law of thermodynamics, the platelet-shaped particles demonstrate the best performance at the invariant Re, while at the constant $\dot{W}$, the oblate spheroid-shaped nanoparticles are recommended. The thermal irreversibility of the nanofluid in the case of constant Re only reduces using the oblate spheroid-shaped nanoparticles. The smallest exergy destruction in the case of constant Ẇ belongs to the blade-shaped nanoparticles.

通过关于五种不同纳米颗粒形状的 CFD 分析，研究了在螺旋换热器内使用勃姆石氧化铝纳米流体的能量、火用和流体动力学特性。数值模拟在四个不同的体积分数范围内进行，范围从 0 到 0.04。发现以更高的体积分数利用纳米流体可提高热交换量、总传热系数 ( U ) 和效率。发现在恒定雷诺数 (Re) 下U的最高上升约为 25.4%，而在恒定泵功率 ($\dot{宽}$) 为 6.35%。此外，关于热效率的观点，建议在恒定 Re 下使用片状纳米颗粒。考虑到能源效率的观点，建议使用扁球形纳米颗粒。根据热力学第二定律，片状颗粒在 Re 不变时表现出最佳性能，而在常数 Re$\dot{宽}$，推荐使用扁球形纳米颗粒。在恒定 Re 的情况下，纳米流体的热不可逆性仅通过使用扁球状纳米颗粒来降低。在恒定Ẇ的情况下，最小的火用破坏属于刀片状纳米粒子。